[mr froude]

Hello,

I am simulating a hydraulic jump using 2D, transient, multiphase (VOF) and RANS based approach. I have used a trapezoidal region to patch the initial distribution of water and this significantly reduced the time to reach the stready jump. [picture attached]

Now that my simulation is finished, I would like to make slight changes to the initial patch and run the simulation again to see the dependence/independence on the initial patch. I would like to keep the patch area the same but add some perturbation like a sine wave to the air/water interphase.

I believe I have to use UDF to achieve this but I would like to know if it is even possible. And if so, any help would be much appreciated.